That's a shame. Really good beer with a ton of unique flavors going on. Not that I would have been able to find it even if they had made a '15.....
I think Mamouche is underrated as far as Loons go. I love that beer. Incredibly unique and delicious. It's on par with St. Lamvinus and Vigneronne for me.
In the two bottles I've had, I haven't noticed that at all. Just a pleasant grassiness and distinct flavors of elderflowers. This may be one of those "cilantro is soap" things.